Strategy template does not save value

[kujista]

Hi I have this parameter in strategy

        [Display(ResourceType = typeof(Custom.Resource), Name = "Session A Begin", GroupName = filterTradingTimeGroup, Order = filterTradingTimeOrder + 2)]
        [Description("Počáteční čas seance")]
        public TimeSpan FilterTTSessionABegin {
            get { return tFilterTTSessionABegin; }
            set { tFilterTTSessionABegin = value; }
        }
​

when i try to save template of strategy it does not save value. Do I have to do some serialization or why is that?
Thanks for help
Paul

[bltdavid]

Do you get an error message in the Ninja log window?

You could also try looking directly in the log file, by going
into the 'log' folder and using notepad to look at the most
recent log file with today's date.

In fact, check the 'trace' folder, sometimes error messages
show up there.

The newest error messages would be at the bottom, since
NinjaTrader just appends log/trace messages as it goes.

My point is:
The answer to your question about needing to do serialization
is something you can answer yourself if you see such error
messages inside the log and/or trace file.

-=o=-

Xml serialization is pretty easy. As an experiment to see if
the error goes away, why not try it?

[NinjaTrader_Emily]

Hello kujista,

Thank you for your post.

A TimeSpan may not be Xml serialized in the same way as other types, so you could use a simple type against the TimeSpan to serialize it, just like the example at the bottom of the following page:

• https://ninjatrader.com/support/help...yattribute.htm

Brushes are another type that may not be serialized directly into the .xml file. For more details that serve as an additional explanation of this concept and how it works, please see the following links:

• https://ninjatrader.com/support/help...definedbrushes
• https://ninjatrader.com/support/help...lor_inputs.htm

Please let us know if we may be of further assistance.

[bltdavid]

Don't use the TimeSpan example in the first link.

That code is clumsy and incorrect.

Or, to put it another way, it creates really stupid code
in the automatic 'generated' magic code section.

-=o=-

Here is the correct way NinjaTrader's TimeSpan Xml
serialization example should have been coded,

[XmlIgnore] // cannot serialize type of TimeSpan, use the BeginTimeSpanSerialize object to persist properties
[NinjaScriptProperty]
[Display(Name = "Begin TimeSpan", GroupName = "NinjaScriptStrategyParameters", Order = 1)]
public TimeSpan BeginTimeSpan
{ get; set; }

[Browsable(false)] // prevents this property from showing up on the UI
public string BeginTimeSpanSerialize
{
    get { return BeginTimeSpan.ToString(); }
    set { BeginTimeSpan = TimeSpan.Parse(value); }
}​

[bltdavid]

Emily, you should submit a bug report and have the example code
on that help page corrected.

[bltdavid]

why is that?

A good question.

The answer can be difficult to grasp, for newbies and intermediate
programmers alike. Even experienced programmers may not be that
familiar with the big picture. To help our discussion, let's make one up.

What I'm about to explain is unique from my brain to yours. I've never
seen it explained this way -- so, I hope it makes sense.

Let's start with this graphic ...

[To continue reading, see attached file.]

[QuantKey_Bruce]

What I'm about to explain is unique from my brain to yours. I've never
seen it explained this way -- so, I hope it makes sense.

Very nice. Good job with this.

[NinjaTrader_Emily]

Emily, you should submit a bug report and have the example code
on that help page corrected.

Hello bltdavid,

Thank you for your feedback and for pointing out the error. The example in the help guide has now been edited:

https://ninjatrader.com/support/helpGuides/nt8/ninjascriptpropertyattribute.htm

[bltdavid]

Thank you for your feedback and for pointing out the error. The example in the help guide has now been edited:
https://ninjatrader.com/support/help...yattribute.htm

You sure?
I've used Chrome and Firefox, cleared cache on both.

With regards to the TimeSpan example,

1. The [Browsable[false] attribute needs to be moved to the bottom property,
aka, the BeginTimeSpanSerialize property.

2. The [NinjaScriptProperty] and the [Display(...)] property need to be
moved to the top property, which is the BeginTimeSpan property.

Do you agree with these corrections?

My point is:
I'm pretty sure my suggested corrections are, in fact, correct.
But I don't yet see these corrections reflected on that help page.

[NinjaTrader_Emily]

Hello bltdavid,

I apologize for the confusion and miscommunication.

The edit has been submitted pending review; it has not been reflected yet in the help guide but it should be resolved in the near future.

[bltdavid]

Ah-hah!

Ok, thanks for letting me know

[kujista]

Hi thanks for help, i have problem when i add serialization to existing fielad it does not work.. is there some cache or do I have to do some magic?

[bltdavid]

Does not work how?
No, there is no cache.

Did you try this?
Open NinjaScript editor, then open the indicator file
in question, make a very small change such as adding
a comment, recompile (the small change will force the
indicator in the editor window to get new magic code
at the bottom), then exit Editor, exit NT, restart NT,
in brand new chart, load indicator, try to save chart
template, get any errors? If not, open new chart,
load new chart template (with indicator embedded),
do you get any errors when chart is created?

Fastest option:
Just post your code, let us take a look at it.